Correctly clip left of panes.

regress/screen-redraw-floating.sh

@@ -58,6 +58,11 @@ tile_2x2() {
 	$TMUX2 select-layout tiled || exit 1
 }
 
+# fill_base_pattern: make clipped floating panes visibly cover every column.
+fill_base_pattern() {
+	$TMUX2 respawnp -k "sh -c 'i=0; while [ \$i -lt 12 ]; do printf \"%02d:abcdefghijklmnopqrstuvwxyz0123456789\n\" \$i; i=\$((i + 1)); done; exec sleep 100'" || exit 1
+}
+
 $TMUX kill-server 2>/dev/null
 $TMUX2 kill-server 2>/dev/null
 
@@ -118,6 +123,28 @@ new_scene 40 12
 $TMUX2 new-pane -x18 -y6 -X-4 -Y-2 "sh -c 'printf TL; exec sleep 100'" || exit 1
 compare floating-clip-topleft
 
+# Floating panes clipped at each edge. The patterned base pane makes sure the
+# clipped edge still obscures both content and borders underneath.
+new_scene 40 12
+fill_base_pattern
+$TMUX2 new-pane -x20 -y6 -X-10 -Y3 "sh -c 'printf LEFT; exec sleep 100'" || exit 1
+compare floating-clip-left
+
+new_scene 40 12
+fill_base_pattern
+$TMUX2 new-pane -x20 -y6 -X30 -Y3 "sh -c 'printf RIGHT; exec sleep 100'" || exit 1
+compare floating-clip-right
+
+new_scene 40 12
+fill_base_pattern
+$TMUX2 new-pane -x20 -y6 -X10 -Y-3 "sh -c 'printf TOP; exec sleep 100'" || exit 1
+compare floating-clip-top
+
+new_scene 40 12
+fill_base_pattern
+$TMUX2 new-pane -x20 -y6 -X10 -Y9 "sh -c 'printf BOTTOM; exec sleep 100'" || exit 1
+compare floating-clip-bottom
+
 # Floating pane over a tiled 2x2 grid: the float draws a complete box and must
 # NOT merge its borders with the tiled pane borders underneath.
 new_scene 40 12

regress/screen-redraw-results/floating-clip-bottom.result

@@ -0,0 +1,12 @@
+01:abcdefghijklmnopqrstuvwxyz0123456789
+02:abcdefghijklmnopqrstuvwxyz0123456789
+03:abcdefghijklmnopqrstuvwxyz0123456789
+04:abcdefghijklmnopqrstuvwxyz0123456789
+05:abcdefghijklmnopqrstuvwxyz0123456789
+06:abcdefghijklmnopqrstuvwxyz0123456789
+07:abcdefghijklmnopqrstuvwxyz0123456789
+08:abcdefghijklmnopqrstuvwxyz0123456789
+09:abcdef┌────────────────────┐23456789
+10:abcdef│BOTTOM              │23456789
+11:abcdef│                    │23456789
+         │                    │

regress/screen-redraw-results/floating-clip-left.result

@@ -0,0 +1,12 @@
+01:abcdefghijklmnopqrstuvwxyz0123456789
+02:abcdefghijklmnopqrstuvwxyz0123456789
+──────────┐ijklmnopqrstuvwxyz0123456789
+          │ijklmnopqrstuvwxyz0123456789
+          │ijklmnopqrstuvwxyz0123456789
+          │ijklmnopqrstuvwxyz0123456789
+          │ijklmnopqrstuvwxyz0123456789
+          │ijklmnopqrstuvwxyz0123456789
+          │ijklmnopqrstuvwxyz0123456789
+──────────┘ijklmnopqrstuvwxyz0123456789
+11:abcdefghijklmnopqrstuvwxyz0123456789
+

regress/screen-redraw-results/floating-clip-right.result

@@ -0,0 +1,12 @@
+01:abcdefghijklmnopqrstuvwxyz0123456789
+02:abcdefghijklmnopqrstuvwxyz0123456789
+03:abcdefghijklmnopqrstuvwxyz┌──────────
+04:abcdefghijklmnopqrstuvwxyz│RIGHT
+05:abcdefghijklmnopqrstuvwxyz│
+06:abcdefghijklmnopqrstuvwxyz│
+07:abcdefghijklmnopqrstuvwxyz│
+08:abcdefghijklmnopqrstuvwxyz│
+09:abcdefghijklmnopqrstuvwxyz│
+10:abcdefghijklmnopqrstuvwxyz└──────────
+11:abcdefghijklmnopqrstuvwxyz0123456789
+

regress/screen-redraw-results/floating-clip-top.result

@@ -0,0 +1,12 @@
+01:abcdef│                    │23456789
+02:abcdef│                    │23456789
+03:abcdef│                    │23456789
+04:abcdef└────────────────────┘23456789
+05:abcdefghijklmnopqrstuvwxyz0123456789
+06:abcdefghijklmnopqrstuvwxyz0123456789
+07:abcdefghijklmnopqrstuvwxyz0123456789
+08:abcdefghijklmnopqrstuvwxyz0123456789
+09:abcdefghijklmnopqrstuvwxyz0123456789
+10:abcdefghijklmnopqrstuvwxyz0123456789
+11:abcdefghijklmnopqrstuvwxyz0123456789
+

regress/screen-redraw-results/floating-clip-topleft.result

@@ -1,8 +1,8 @@
-base
               │
               │
               │
- ─────────────┘
+              │
+──────────────┘
 
 
 

screen-redraw.c

@@ -358,11 +358,11 @@ redraw_pane_to_scene(struct redraw_build_ctx *bctx, struct window_pane *wp,
 		top = wp->yoff - 1;
 		bottom = wp->yoff + wp->sy;
 
-		if (left < 0 && wx <= 0)
+		if (left < 0 && wx < 0)
 			return (0);
 		if (right > (int)bctx->w->sx && wx >= (int)bctx->w->sx)
 			return (0);
-		if (top < 0 && wy <= 0)
+		if (top < 0 && wy < 0)
 			return (0);
 		if (bottom > (int)bctx->w->sy && wy >= (int)bctx->w->sy)
 			return (0);
@@ -685,11 +685,11 @@ redraw_mark_pane_borders(struct redraw_build_ctx *bctx, struct window_pane *wp,
 
 	if (floating) {
 		if (left < 0)
-			left = 1;
+			left = 0;
 		if (right > (int)bctx->w->sx)
 			right = (int)bctx->w->sx - 1;
 		if (top < 0)
-			top = 1;
+			top = 0;
 		if (bottom > (int)bctx->w->sy)
 			bottom = (int)bctx->w->sy - 1;
 	} else {